1. small black sawfly native to Europe but established in eastern United States; larvae mine the leaves of birches causing serious defoliation; [syn: birch leaf miner, Fenusa pusilla]
WordNet (r) 3.0 (2006):
birch leaf miner
n 1: small black sawfly native to Europe but established in
eastern United States; larvae mine the leaves of birches
causing serious defoliation [syn: birch leaf miner,
Fenusa pusilla]